/Engine/Source/Editor/Sequencer/Public/MVVM/ViewModels/SequencerEditorViewModel.h
Creates the selection class for this editor.
virtual [TSharedPtr](API\Runtime\Core\Templates\TSharedPtr)< [FSequencerCoreSelection](API\Editor\SequencerCore\MVVM\Selection\FSequencerCoreSelection) > CreateSelectionImpl()